Abstract: A solid air-improving composition comprising a carrier material, a volatile active material gradually evaporating therefrom and a gel formed by a paraffin component and a gelifying metal soap is improved by providing a deodorant agent or an odorant agent or a mixture of these agents as said active material, a liquid paraffin having at 20.degree. C an evaporation number ranging from 8 to 1000 based on the evaporation number at 20.degree. C of diethyl ether being equal one, constituting the paraffin component, the metal soap constituting the non-evaporating carrier material proper, and water in an amount sufficient for complete gelling of the metal soap and liquid paraffin; the active agent evaporates from the composition with preservation of the outer appearance of the latter but with shrinkage of its volume.

Abstract: Vaporizers with flat wicks folded into U-shape within open-topped, laterally apertured generally prismatic casings, capped by complementary covers which are vertically slidable thereon to control the escape of a volatile liquid impregnating the wicks, are mass-produced on a plurality of assembly lines each comprising a wick-loading station, an impregnating station, an insertion station and a capping station. The dry and unfolded wicks are successively advanced from their loading station along an upper track past the impregnating station, where they are permeated with the liquid, to the insertion station in which a plunger thrusts each wick through a narrow central slit into an aligned casing waiting on a lower track, the wick being doubled in passing through the slit into the casing.

Abstract: A deodorizing or perfuming assembly having a casing consisting of a mantle having two open ends and two flattened side walls opposite one another. An attachment for affixing the assembly to a supporting surface is located on one of the flattened side walls and this side wall has slots for the access of air to the interior of the mantle. A plate or sheet of absorbent material impregnated with a deodorizing or perfuming substance is located in the interior of the mantle. A clamp protruding from one of the interior faces of the flattened side walls holds the plate or sheet with its surface spaced from the inside wall surface of the mantle.